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Finding the Fourth Proportional to 13,600.65, 20,392.65 and 12,440.43

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Solution

The fourth proportional to 13,600.65, 20,392.65 and 12,440.43 is: 18,653.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,600.65 : 20,392.65 = 12,440.43 : x
  2. Step 2: Convert to fraction form
    13,600.65/20,392.65 = 12,440.43/x
  3. Step 3: Cross multiply
    13,600.65x = 20,392.65 × 12,440.43
  4. Step 4: Simplify right side
    13,600.65x = 253,693,334.84
  5. Step 5: Solve for x
    x = 253,693,334.84/13,600.65
  6. Step 6: Final answer
    x = 18,653.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.